Clara Zetkin, née Clara Eissner (born July 5, 1857, Wiederau, Saxony [Germany]—died June 20, 1933, Arkhangelskoye, Russia, U.S.S.R.) German feminist, Socialist, and Communist leader, who after World War I played a leading role in the new Communist Party of Germany (Kommunistische Partei Deutschlands; KPD) and the Comintern (Third International).

Clara Eissner was educated at the Leipzig Teachers’ College for Women, and while at school she established contacts with the infant Sozialdemokratische Partei Deutschlands (SPD; Social Democratic Party). Her association with Russian revolutionaries led to her marriage with an exile, Ossip Zetkin (1848–89). She spent most of the 1880s in self-imposed exile in Switzerland and Paris, writing and distributing illegal literature and meeting many leading international Socialists.

After participating in the founding congress of the Second Socialist International (1889), she returned to Germany and from Stuttgart edited the Socialist women’s paper DieGleichheit (“Equality”) from 1892 to 1917. In 1907 she was a cofounder of the International Socialist Women’s Congress.

A personal friend of Lenin and of the revolutionary writer and activist Rosa Luxemburg, Clara Zetkin organized the first international women’s conference against World War I (Bern, 1915), was a cofounder in 1916 of the radical Spartacus League (Spartakusbund), and joined the new Communist Party of Germany in 1919, becoming a member of the party’s central committee and serving in the Reichstag (federal lower house) from 1920.

Elected to the presidium of the Third International (1921), she spent more and more of her time in Moscow. After Lenin’s death in 1924, she began to lose much of her influence. Three volumes of collected works, Ausgewählte Reden und Schriften (“Selected Speeches and Writings”), were published in East Berlin from 1957 to 1960.

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